Office Depot has these nice little Pencil Boxes for back-to-school, only $0.79. I was looking at them and thinking they might work as a snoot. I do like my cereal box/gaffers tape ones, but this his a very nice high grade plastic so I figured it might be worth the gamble. So I picked up 2. They fit my SB-800s very snug, but the black part does fit over them. I figure I can cut it to fit and I've got a store bought looking modifier for under a buck.
The even better part is the inside, its a nice translucent plastic that lights up just like an expensive diffuser material for a flash. So its 2 for 1, you get some nice material to play with to make your own design for a diffuser and a snoot.
Let me know if you pick one up and find a good use for it!